Question

无论如何都要从c＃中获取RadCombobox的最后一个选定值。请指教

我做了类似的事

protected void cboTest_SelectedIndexChanged(object o, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
{
Session["CurrentItem"] = e.value;
}

public int GetLastSelectedItem
{
    set { Session["CurrentItem"] = value;}
}

then i need to access the session
int productId = 0;
productId = //need to assigned previous selected radcombo value

Answer 1

您可以尝试以下代码

string old_value = "";
string new_value = "";
protected void cboTest_SelectedIndexChanged(object o, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
{
    old_value = e.OldValue;
    new_value = e.Value;
    //do whatever you want with these values
}

Answer 2

Ummar是对的，现在如果你想通过应用你的代码来做到这一点，试试这个：

我建议使用ViewState，会话变量总是难以处理，如果只是以那种形式需要它也没有意义。

这样的事情：

string LastSelectedValue
{
  get { return ViewState["LastSelectedValue"] as string; }
  set { ViewState["LastSelectedValue"] = value; }
}

protected void cboTest_SelectedIndexChanged(object o, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
{
    if(string.IsNullOrEmpty(this.LastSelectedValue))
    {
        //This is the first time the user changes the index
    }
    else
    {
        //The last selected Value is stored in this.LastSelectedValue
    }

    // last line of your code must be this one
    this.LastSelectedValue = this.cboTest.SelectedValue;
}

如何从RadComboBox获取最后选择的值

2 个答案: